JPS6319634Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the improvement of disc brakes used for braking automobiles, and is particularly aimed at preventing the generation of noise during braking.

2. Description of the Related Art Conventionally, disc brakes having a structure as shown in FIGS. 1 and 2 have been widely known. That is, a support 2 is provided so as to sandwich the peripheral edge of the rotor 1 that rotates together with the wheels, and this support 2
A caliper 4 is slidably supported on guide pins 3 erected at both ends of the rotor 1, and a pair of front and back pads 5 are supported on a support 2 so as to be slidable in the axle direction. It is. When performing braking, when one pad is pressed against one side of the rotor 1 by the piston built in the caliper 4, the caliper 4 slides against the support 2 as a reaction, and the caliper pawls 4a, 4a push the other pad against the side surface of the rotor 1. Press the pad against the other side of the rotor 1. As a result, the rotor 1 is strongly pressed by the pads 5 from both sides, thereby performing braking.

Incidentally, in a disc brake constructed and operated as described above, noise called squeal is often generated during braking. As a result of the inventor's research into the cause of this noise generation, the noise is generated when the caliper 4 does not slide smoothly against the support 2 and the caliper 4 is tilted relative to the rotor 1 and support 2. I understood. That is, during braking, the caliper 4 moves a little with respect to the support 2, and the distance between the end surfaces of the sliding parts 4b, 4b of the caliper 4 and the support 2 (Fig. 2 a, b) becomes shorter, but this movement distance Figure 3A (solid line is distance a,
The dashed lines indicate changes due to each movement of the distance b. ), no noise is generated when the distances are approximately equal on both sides of the caliper 4. However, sometimes the moving distance on one side of the caliper 4 (a in Fig. 2) becomes large as shown by the solid line in Fig. 3B, while the moving distance on the other side (a in Fig. 2) increases. b side)
may become small as shown by the broken line in the figure, and in extreme cases, the other side of the caliper 4 may move away from the support 2 during braking, as shown in FIG. 3C. In this way, if the amount of movement of the caliper 4 differs between the anchor side and the anti-anchor side, the caliper 4 will be inclined with respect to the rotor 1, and the pressing force of the pad 5 toward the rotor 1 by the caliper 4 will be averaged. Therefore, it is thought that when the pad 5 rubs against the side surface of the rotor 1, it vibrates abnormally and generates noise.

In order to prevent the occurrence of noise due to such causes, it is sufficient to prevent the caliper 4 from tilting with respect to the support 2 during braking, but the guide pins 3, 3
In a type of disc brake in which the caliper 4 is supported by the guide pins 3, 3 and the sliding part 4 of the caliper 4, in order to make the caliper 4 slide smoothly,
b and 4b are fitted with a slight margin.
For this reason, in conventional disc brakes of this type, it is inevitable that the caliper 4 will tilt.
Noise was often generated when braking.

The disc brake of the present invention eliminates the above-mentioned disadvantages and prevents the generation of noise during braking.

Hereinafter, the present invention will be explained with reference to drawings showing embodiments.

FIG. 4 shows an embodiment of the invention. Sliding parts 4b, 4b formed at both left and right ends of the caliper 4 are attached to guide pins 3, 3 planted at both left and right ends of the support 2, which is provided so as to sandwich the peripheral edge of the rotor 1 (not shown in FIG. 4). Externally fit this caliper 4
It is similar to a conventional disc brake in that the pair of pads 5 supported on the support 2 are pressed against both sides of the rotor by a piston installed inside the brake pad and caliper claws 4a, 4a integrally formed on the outer end of the caliper 4. It is. The features of the disc brake of this invention are:
The curved spring material 7 allows the caliper claws 4a, 4a to
The purpose of this is to effectively support the caliper, which tends to tilt toward the support 2 due to the frictional force with the pad 5 during braking, and hold the caliper in its normal position. As shown in FIG. 5, the spring material 7 used in this embodiment has bent pieces 7b and 7c by bending both ends of a curved main body portion 7a at right angles in the same direction, and one bent piece 7b. Add the end part to the main body part 7
It is bent at right angles in the direction opposite to the bending direction of a to form the bent piece 7d. As shown in FIG. 4, the spring material 7 formed in this manner is pressed against the side surfaces of the caliper claws 4a, 4a with the main body portion 7a pressed against the sides of the caliper claws 4a, 4a.
One bent piece 7c is inserted into a small hole 8 made on the front surface of the support 2, and the other bent piece 7d is inserted into a small hole 9 made on the inner side of the support 2, so that it is attached to the support 2. Ru. The spring member 7, which is thus attached to the support 2 and presses the side surfaces of the caliper claws 4a, 4a, always regulates the position of the caliper 4 to the normal position and prevents the generation of noise during braking.

As described above, the disc brake of the present invention has a simple structure and can effectively prevent the generation of noise during braking.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional disc brake,
Figure 1 is a front view, Figure 2 is a partial cross-sectional plan view, and Figure 3 is a front view.
Figures A to C are diagrams showing the amount of left and right movement of the caliper during braking, Figure 4 is a front view showing an embodiment of the present invention, and Figure 5 is a perspective view of the spring material. 1...Rotor, 2...Support, 3...Guide pin, 4...Caliper, 4a...Caliper claw, 4
b...Sliding part, 5...Pad, 7...Spring material, 7
a...Body portion, 7b, 7c, 7d...Bent pieces, 8, 9...Small hole.

Claims (1)

[Scope of utility model registration request] A pair of pads 5, 5 located on both sides of the rotor 1 are supported slidably in the axle direction on a support 2 provided so as to sandwich the peripheral edge of the rotor 1 which rotates together with the wheels. In a disc brake, sliding parts 4b, 4b at both ends of a caliper 4, which press the pads with built-in pistons and caliper claws 4a, 4a, are slidably fitted onto vertical guide pins 3, 3. Spring piece 7
Form bent pieces 7c and 7d at both ends of the curved main body portion 7a, respectively, and insert the bent pieces 7c and 7d into small holes 8 and 9 provided in the support 2 to attach the spring piece 7 to the support 2. In addition, the main body portion 7a
A disc brake characterized in that the lower part of the side facing the support of the caliper pawl 4a is pressed.